we know that. >> woodruff: what about the romney camp? what are they doing? >> they're doing a little bit more traditional. they're reaching out on facebook and twitter and on their mobile app they're geotargeting people meaning when you say you live in the district of columbia or you live in florida ther able to target the early voting to your city. >> the romney campaign working with google. what they do is you buy up popular search terms so that you have a way of serving up your ads to people who might be interested in politics. >> brown: so there's a way for all kinds of voters to interact if you live in a state where there's early voting. >> 72 states are allowing in person voting. >> brown: what about twitter? you were telling me there's a twitter presence here, too. >> there is a twitter presence and we're finding people on twitter-- and i think we might have said this before at some point-- they are very emotionally-- can get very emotionally involved and emotionally attached to the people they're communicating with on twit sore if there's something t